cluster
Hungarian composer
Definition
The simultaneous sounding of several adjacent notes played with the palm, fist, or forearm rather than individual fingers; a core sonority in Kurtág's piano writing, used throughout Játékok.
Interpretive Guidance
Clusters should be approached with relaxed weight, not tension. Differentiate between palm clusters (softer, more diffuse) and fist or forearm clusters (denser, more percussive) — Kurtág notates each specifically.